Starting for low concentration of radionuclide Cs-137 in fish, is expecting to
have also low contribution in radiological impact at human population by ingestion.
For individual the annual estimation is 0,08 microSv, but for member from target
group is ten times higher, following increased diet. Collective dose in Constanta
County is less than 0,038 manSv yearly, but for group eating more fish this is less
than 0,27 manSv.
Regarding K40, individual dose contribution is 7 microSv, increased one order
for more fish in diet. At county level, the collective dose is less than 3,2 manSv per
year, increasing at maximum 22,6 manSv for target group (mainly urban
population).
These considerations are based on conservative frame (fish with mean concentration, all weight being ingested, the people eating an equal diet). In reality, the fish
catch consumed entirely can not deliver more as 3 mSv throughout one year, for
Cs137, respectively maximum 0,26 Sv annually, for K40, to all population.
15.5 Conclusions
Artificial radioactivity content in fish from Romanian Black Sea sector is in decimal
units of Bq per kg wet.
The total permissible dose of 1 mSv yearly for a person from population, is not
exceeded by ingestion of fish.
Considering (UNSCEAR 1993) that in Romania the population receives, from
natural background, 2.27 mSv/year and 0.33 mSv/year by artificial sources, sea fish
ingestion has, comparatively, a low contribution at target group doses (individual).
These values are infrequent, because the amounts consumed over possible
individual values are lower than the estimated annual values (10 and 100 kg).
The dose evaluation by ingestion of fish catch is more realistic, but the knowledge of the real distributions of consumption and doses are unknown (the consumption of fish is mainly appreciated for locals).
Table 15.2 Radiological impact for people from individual and collective dose contributions
Radionuclide
EIndP
EIndTG
EcolCta
EcolTGCta
ECatch
(Sv/y)
(Sv/y)
(manSv/y)
(manSv/y)
(Sv/y)
Cs137
0.83 E-7
0.83 E-6
0.038
0.27
0.003
K40
0.7 E-5
0.7 E-4
3.2
22.6
0.26
15 Radioactive Content in Fish from Black Sea Caches. Its Impact on. . .
245
have also low contribution in radiological impact at human population by ingestion.
For individual the annual estimation is 0,08 microSv, but for member from target
group is ten times higher, following increased diet. Collective dose in Constanta
County is less than 0,038 manSv yearly, but for group eating more fish this is less
than 0,27 manSv.
Regarding K40, individual dose contribution is 7 microSv, increased one order
for more fish in diet. At county level, the collective dose is less than 3,2 manSv per
year, increasing at maximum 22,6 manSv for target group (mainly urban
population).
These considerations are based on conservative frame (fish with mean concentration, all weight being ingested, the people eating an equal diet). In reality, the fish
catch consumed entirely can not deliver more as 3 mSv throughout one year, for
Cs137, respectively maximum 0,26 Sv annually, for K40, to all population.
15.5 Conclusions
Artificial radioactivity content in fish from Romanian Black Sea sector is in decimal
units of Bq per kg wet.
The total permissible dose of 1 mSv yearly for a person from population, is not
exceeded by ingestion of fish.
Considering (UNSCEAR 1993) that in Romania the population receives, from
natural background, 2.27 mSv/year and 0.33 mSv/year by artificial sources, sea fish
ingestion has, comparatively, a low contribution at target group doses (individual).
These values are infrequent, because the amounts consumed over possible
individual values are lower than the estimated annual values (10 and 100 kg).
The dose evaluation by ingestion of fish catch is more realistic, but the knowledge of the real distributions of consumption and doses are unknown (the consumption of fish is mainly appreciated for locals).
Table 15.2 Radiological impact for people from individual and collective dose contributions
Radionuclide
EIndP
EIndTG
EcolCta
EcolTGCta
ECatch
(Sv/y)
(Sv/y)
(manSv/y)
(manSv/y)
(Sv/y)
Cs137
0.83 E-7
0.83 E-6
0.038
0.27
0.003
K40
0.7 E-5
0.7 E-4
3.2
22.6
0.26
15 Radioactive Content in Fish from Black Sea Caches. Its Impact on. . .
245